Rivet bucker



April 1945- R. J. TOWNSEND- 2,373,277

RIVET BUCKER Filed Nov. 27, 1943 2 Sheets-Sheet l I v Inventor Ex poem'rc/ 75w/vs/v0 April 10, 1945. END

RIVET BUCKER Filed Nov. 2'7, 1943 2 Sheets-Sheet 2 Inventor rPOBEPTJ 75mvsm/0 @4010 v v and Q: Wave; fim

Patented Apr. 10, 1945 UNET T OFFICE 2 Claims.

This invention relates to new and useful improvements in rivet buckers and more particularly to a bucker for flattening the ends of aluminum rivets in a one man operation The principal object of the present invention is to provide a rivet bucker which can be used inside of wings, ailerons and various other structures for bucking rivets, especially aluminum rivets, to the end that riveting of this category can be done single handedly whereas at present at least two men are necessary.

secured together as at IS. The bar l6 has a pivotal detent hook l9 which is engageable with an eye 20 on the pivotal bar I as is clearly shown in Figure 1. Thus the bars 8, 9 can be held in contracted relation to permit insertion of the device i into the work, after which upon releasement of the detent hook 19, the springs M will force the bars 8, 9 apart to engage the rivets as shown in Figure 4.

Various other important objects and advantages of the invention will become apparent to the reader of the following description.

In the drawings:

Figure 1 is a fragmentary vertical sectional view showing the bucker inserted into work.

Figure 2 is a top plan view of the bucker.

Figure 3 is a fragmentary detailed sectional view taken on the line 3-3 of Figure 2.

Figure 4 is a fragmentary longitudinal sectional view taken on the line 4-4 of Figure 2, after the bars of the bucker have been released to expanded position.

Figure 5 is a fragmentary detailed sectional view similar to that of Figure 4 but showing the bar and one of the rivets after the rivet has been flattened.

Figure 6 is a fragmentary sectional view showing a modified form of bucker used in conjunction with parallel sides of work.

Referring to Figure 1, wherein like numerals designate like parts, it can be seen that numeral 5 denotes a piece of work which may be a portion of an aileron. Numerals 6 denote rivets disposed through overlapping portions of the sheet material of which the aileron i constructed, while numeral 1 generally refers to the present invention which is inserted into the aileron and released to engage the rivets as shown in Figure 4.

The device 1 consists of a pair of bars 8, 9, each of which at its outer side has a strip 10 of some protective material so as to not scratch the surface of the aileron. Each part at its outer side and extending through the covering H) has recesses I l for receiving the inner ends of aluminum rivets I2 which project inwardly through openings in the work 5.

Projecting inwardly from the bars 8, 9 are small studs 13 which project into the end convolutions of compression springs M.

A pair of link bars I5, 15 each has one end pivotally secured as at I! to the corresponding bars 8, 9, while the remaining ends are pivotally Slotted members 2| project from the bar 8 and receive the laterally disposed end portions 22 of arms 23 which project inwardly from the bar 9, thus defining guide means for the bars 8, 9.

Suitable handles 24 are provided for the bars 8, 9 so that they may be manually actuated.

Obviously, when the detent hook I9 has released the bars 8, 9 they will assume the position shown in Figure 4. The riveting tool in acting on the rivet will vibrate the device 7 and this will function as a bucker for the rivet, to the end that the rivet is flattened as shown in Figure 5.

Figure 6 is a modification of the invention, reference character 5a denoting work into which the modified device generally referred to by reference character 7a is inserted. This form of the invention is used for work having parallel sides and consists of straight bars 8a, 9a having handles 24a and springs Ma interposed between the same as'in the manner of the device shown in Figure 1. The bars 811, 9a have pivotal connecting bars I5a, 16a and latch means I 9a. The

outer sides of the bars 8a, 9a have protecting strips Illa and are formed with rivet receiving recesses Ha.

While the foregoing specification sets forth the invention in specific terms, it is to be understood that numerous changes in the shape, size and materials may be resorted to without departing from the spirit and scope of the invention as claimed hereinafter.

Having described the invention, what is claimed as new is:

1 An insertable rivet bucker comprising a pair of opposed bucking bars and spring cushioning means interposed between the bars, said bars having recesses for receiving rivets projecting through the enveloping work.

2. An insertable rivet bucker comprising a pair of opposed bucking bars and spring cushioning means interposed between the bars, and holding means for holding the bars in contracted position against the force and efiect of the spring means..

ROBERT J. TOWNSEND. 

